Verification of performance on concrete containing large quantity of fly ash with full scale specimens

The concretes containing large quantity of fly ash with constant portland cement content were produced at the ready-mixed concrete plants, and placed into full scale formworks. Their fresh and hardened properties were measured and discussed. 1. At various fly ash content per unit volume, for example 455kg/m³, the concretes which have various flowability, such as medium or high fluidity concrete, were produced easily. And they could be filled smoothly into narrow space of wall formworks with reinforcements. 2. The fly ash concretes appeared higher compressive strength from the early age and carbonation resistance than those of the concrete without fly ash.